public async Task Geo()
{
LCObject obj = new LCObject("Todo");
LCGeoPoint location = new LCGeoPoint(39.9, 116.4);
obj["location"] = location;
await obj.Save();
// near
LCQuery <LCObject> query = new LCQuery <LCObject>("Todo");
LCGeoPoint point = new LCGeoPoint(39.91, 116.41);
query.WhereNear("location", point);
ReadOnlyCollection <LCObject> results = await query.Find();
Assert.Greater(results.Count, 0);
// in box
query = new LCQuery <LCObject>("Todo");
LCGeoPoint southwest = new LCGeoPoint(30, 115);
LCGeoPoint northeast = new LCGeoPoint(40, 118);
query.WhereWithinGeoBox("location", southwest, northeast);
results = await query.Find();
Assert.Greater(results.Count, 0);
}